a-a a-c a-t aaa aac aae aam aan aat ac- aca acc ace acm acn act aea aec aee aem aen aet ama amc ame amm amn amt an- ana anc ane anm ann ant at- ata atc ate atm atn att c-- caa cac cae cam can cat cca ccc cce ccm ccn cct ce- cea cec cee cem cen cet cma cmc cme cmm cmn cmt cn- cna cnc cne cnm cnn cnt cta ctc cte ctm ctn ctt eaa eac eae eam ean eat ec- eca ecc ece ecm ecn ect eea eec eee eem een eet em- ema emc eme emm emn emt en- ena enc ene enm enn ent eta etc ete etm etn ett maa mac mae mam man mat mc- mca mcc mce mcm mcn mct mea mec mee mem men met mma mmc mme mmm mmn mmt mna mnc mne mnm mnn mnt mta mtc mte mtm mtn mtt naa nac nae nam nan nat nca ncc nce ncm ncn nct ne- nea nec nee nem nen net nma nmc nme nmm nmn nmt nna nnc nne nnm nnn nnt nta ntc nte ntm ntn ntt taa tac tae tam tan tat tca tcc tce tcm tcn tct te- tea tec tee tem ten tet tma tmc tme tmm tmn tmt tna tnc tne tnm tnn tnt tta ttc tte ttm ttn ttt